UNT BIOL 3510 - Introduction to Cells (3 pages)

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Introduction to Cells



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Introduction to Cells

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introduction of cells through model organisms


Lecture number:
1
Pages:
3
Type:
Lecture Note
School:
University of North Texas
Course:
Biol 3510 - Cell Biology
Edition:
1

Unformatted text preview:

BIOL 3510 1st Edition Lecture 1 Outline of Last Lecture Outline of Current Lecture I Introduction to cells II Microscopy III Prokaryotes and Eukaryotes IV Model Organisms Current Lecture Introduction to cells The simplest forms of life are solitary cells Higher organisms are communities of cells derived by growth and division from a single founder cell Therefore cells are the fundamental units of life Cell Theory Cells vary enormously in appearance and function All present day cells are believed to have evolved from an ancestral cell that existed more than 3 billion years ago The fundamental similarity of cells of all types makes it interesting to speculate on the origins of life 1 An amazing degree of similarity in the basic components that make up the inner workings of otherwise vastly different cells 2 Many metabolic pathways are conserved from one cell to another 3 The compounds that make up nucleic acids and proteins are the same in all living cells 4 Important proteins have closely similar detailed structures in prokaryotic cells and eukaryotic cells General Characteristics of a cell All cells grow convert energy from one form to another sense and respond to their environment and reproduce themselves All cells make use of the same types of biomolecules and all use energy All cells are enclosed by a plasma membrane that separates the inside of the cell from the environment All cells have an ability to maintain internal stability homeostasis These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute All cells contain DNA as a store of genetic information and use it to guide the synthesis of RNA molecules and of proteins Living Cells all have a similar basic chemistry All cells are composed of the same sorts of molecules that participate in the same types of chemical reactions Mutations are mistakes in the DNA that change the genetic plan from the previous generation and



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